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Role limitations (allValuesFrom)

Are used to define complex classes by roles

<owl:Class rdf:ID="Exam">   
 <rdfs:subClassOf>         
  <owl:Restriction>       
   <owl:onProperty rdf:resource="#examiner"/>             
    <owl:allValuesFrom rdf:resource="#Professor"/>    
  </owl:Restriction>     
 </rdfs:subClassOf> 
</owl:Class> 
Manchester Syntax 
:Pruefung   rdfs:subClassOf 
[ rdf:type  owl:Restriction ;   owl:onProperty  :examiner ;   
owl:allVauesFrom  :Professor ] . 
Turtle Syntax
I.e. all examiners must be professors.

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